| Abbreviation | Definition |
|---|---|
| NSCO | Nebraska Symphony Chamber Orchestra |
| NSD | No Small Dreams |
| NSDM | National Socialist Death Metal |
| NSJ | North Sea Jazz |
| NSK | No Such Key |
| NSMS | New School for Music Study |
| NSMT | North Shore Music Theatre |
| NSN | Never Shout Never |
| NSO | Nederlands Studenten Orkest |
| NSOA | National School Orchestra Association |
| NSOU | National Symphony Orchestra of Ukraine |
| NSP | Ninja Sex Party |
| NSRO | North Sea Radio Orchestra |
| NSSO | National Schools Symphony Orchestra |
| NSSO | North Shore Symphony Orchestra |
| NSSO | North Staffs Symphony Orchestra |
| NSSO | North Sydney Symphony Orchestra |
| NST | Non-Singing Time |
| NSYNC | JustiN, ChriS, JoeY, JasoN, and JC |
| NSYS | North Sound Youth Symphony |